ABB Pneumatic Transmitter DeltaPi N Series

The Deltapi N series models NAA, NAB and NAD pneumatic differential pressure transmitters are designed for measuring the flow, pressure, differential pressure or level of liquids, steam, gas or air. The measured value is transmitted as a 0.2 to 1 Kgf/cm2 or 3 to 15 lbf/in2 or 20 to 100 kPa pneumatic signal to remotely mounted receiving equipment such as recorders, indicators or controllers or combinations of these items. 

The relative ranges are: 

NAA model 

1. a)  (3000 to 17000) mm H2O, with 2 inch diaphragm 

2. b)  (500 to 5200) mm H2O, with 3 inch diaphragm 

3. c)  (250 to 750) mm H 2O, with 3 inch diaphragm and with a 

   special feedback bellows. 

NAB model 

1. a)  (120 to 750) mm H2O standard version 

2. b)  (60 to 120) mm H2O with a special feedback bellows 

NAD model 

1. a)  (3000 to 17000) mm H2O, with 2 inch diaphragm 

2. b)  (700 to 5200) mm H2O, with 3 inch diaphragm 

In each of the above case the diaphragm capsule can stand an overload on either side equal to the maximum pressure rating of the transmitter. The required measurement span, in accordance with the limitations as set down in the specification can be easily set by a screwdriver adjustment; refer to the models specification sheets.